CN112753179B

CN112753179B - Random access method and random access device

Info

Publication number: CN112753179B
Application number: CN201880098142.2A
Authority: CN
Inventors: 毕文平; 赵越; 王宏; 谢信乾; 余政; 程型清
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2022-06-14
Anticipated expiration: 2038-09-28
Also published as: WO2020062070A1; CN112753179A

Abstract

The embodiment of the application provides a random access method and a random access device, which are used for improving the accuracy of downlink quality measurement. The method of the embodiment of the application comprises the following steps: the method comprises the steps that a terminal device receives first information and second information from a network device, wherein the first information corresponds to a first resource, the second information is used for determining a second resource, and the second resource is a non-vacuum true subset of the first resource; the terminal equipment determines the second resource according to the first information and the second information, wherein the second resource comprises resources used by a downlink physical control channel used by network equipment for scheduling the terminal equipment to retransmit a message III and used by the network equipment to transmit a message IV; the terminal equipment determines channel state information according to the second resource; and the terminal equipment sends a third message to the network equipment, wherein the third message comprises the channel state information.

Description

Random access method and random access device

Technical Field

The present application relates to communications technologies, and in particular, to a random access method and a random access apparatus.

Background

The random access procedure refers to a procedure from the time when the terminal device sends a random access preamble to the time when the terminal device attempts to access the network device to the time when a basic signaling connection is established with the network device.

The random access procedure based on the contention mechanism is completed in four steps, as shown in fig. 1A: step 1, a random access request sent by the terminal device to the network device, which may also be referred to as Msg1, includes a random access preamble; step 2 is a Random Access Response (RAR) message sent by the network device to the terminal device, where the RAR message may also be referred to as Msg 2; step 3, after receiving the RAR, the terminal device performs message transmission based on RAR scheduling in uplink transmission resources allocated by the network device, where the message may also be referred to as Msg 3; the 4 th step is for the network device to send a contention resolution message, which may also be referred to as Msg4, to the terminal device.

The terminal device can determine all narrow bands which can be used for the downlink physical control channel used by the network device for transmitting the Msg4, and then perform channel state measurement on the narrow bands; then, when the terminal device receives the Msg2, the terminal device can determine a corresponding target narrowband, which is one of all the narrowbands determined by the terminal device, and then send Msg3 to the network device, and carry channel state information in Msg 3.

However, since the terminal device determines all the narrow bands that may be used for transmitting the downlink physical control channel used by the Msg4, measures the narrow bands, and carries the channel state information determined according to the measurement result in the Msg3, that is, the terminal device needs to perform channel state measurement on all the determined narrow bands in the measurement period, the measurement time allocated to each narrow band in the measurement period is short, resulting in low accuracy of downlink channel quality measurement.

Disclosure of Invention

The embodiment of the application provides a random access method and a random access device, which are used for improving the accuracy of downlink channel quality measurement.

A first aspect of an embodiment of the present application provides a random access method, including:

in the process of random access, the terminal device may receive first information and second information from the network device, where the first information corresponds to a first resource, the second information is used to determine or correspond to a second resource, and the second resource is a non-vacuum true subset of the first resource; then the terminal device may determine a second resource according to the first information and the second information, where the second resource may include a resource used by a downlink physical control channel used by the network device to schedule the terminal device to retransmit the message three and the network device to transmit the message four; the terminal device may determine the channel state information according to the second resource, and then send a message three to the network device, where the message three includes the channel state information. The resource used by the downlink physical control channel used by the network device to schedule the terminal device to retransmit the message three and the network device to transmit the message four may be a resource used by a first subframe of a downlink physical control channel (PDCCH) configured or scrambled by a temporary cell radio network temporary identifier (TC-RNTI) and/or a cell radio network temporary identifier (C-RNTI) in a random access process.

In this embodiment, the terminal device may determine the second resource according to the first information and the second information, where the second resource is a non-true subset of the first resource, and then determine the channel state information according to the second resource, that is, only the channel state of the second resource needs to be measured, and then the terminal device carries the channel state information determined according to the second resource in the message three and sends the channel state information to the network device. In other words, in this embodiment, only the channel state of the second resource needs to be measured, and the second resource is a non-true subset of the first resource, that is, the measurement time of the channel state of each resource allocated to the second resource in the measurement period is longer, so that the measurement of the channel state information of the second resource is more accurate, and the accuracy of the downlink channel quality measurement is improved.

In one possible implementation, the second information may include preamble related information, where the preamble related information may include at least one of frequency resources for transmitting the preamble, time resources for transmitting the preamble, and a preamble sequence (or a preamble sequence number). The determining, by the terminal device, the second resource according to the first information and the second information may include: the terminal device may determine the second resource according to the preamble related information and the first information.

In this possible implementation, the second information may be related information of a preamble, and then the terminal device may determine the second resource according to the related information of the preamble and the first information, which provides a specific way for the terminal device to determine the second resource.

In another possible implementation, the second information may include a set of indication values, the set of indication values including at least one indication value; the determining, by the terminal device, the second resource according to the first information and the second information may include: the terminal device may determine the second resource from the set of indication values and the first information.

In this possible implementation, the second information may be an indication value set, and the terminal device may determine the second resource by using the indication value set and the first information, and provide another specific way for determining the second resource by using the terminal device.

In another possible implementation manner, the receiving, by the terminal device, the second information from the network device may include: the terminal device may receive a system message from the network device, the system message carrying the set of indication values. In this possible implementation manner, a specific manner is provided for the terminal device to receive the second information, that is, the second information may be obtained through the system message, and in practical application, the implementability of the scheme is improved.

In another possible implementation, the system message may further include the first information. In this possible implementation manner, the terminal device may receive the first information through the system message, which provides a specific manner of acquiring the first information, and in practical application, improves the integrity and the realizability of the scheme.

In another possible implementation manner, the second information may include a number of narrow bands or a narrow band ratio value, where the number of narrow bands is an integer greater than zero, and the narrow band ratio value is greater than zero and smaller than one; the determining, by the terminal device, the second resource according to the first information and the second information may include: the terminal equipment can determine a second resource according to the number of the narrow bands and the first information; or the terminal device may determine the second resource according to the narrowband proportion value and the first information. In this possible implementation manner, another specific manner for determining the second resource by the terminal device is provided, and in practical application, the diversity and the practicability of the scheme are improved.

In another possible implementation manner, the receiving, by the terminal, the second information from the network device may include: the terminal device may receive a broadcast message from the network device, where the broadcast message carries the number of narrow bands or the narrow band ratio value. In this possible implementation manner, a specific manner is provided for the terminal device to receive the second information, that is, the second information may be obtained through a broadcast message, and in practical application, the implementability of the scheme is improved.

In another possible implementation manner, the broadcast message also carries the first information. In this possible implementation manner, the terminal device may receive the first information through the broadcast message, a specific manner for the terminal device to obtain the first information is provided, and in practical application, the diversity and the practicability of the scheme are improved.

In another possible implementation, the channel state information may include one or a combination of the following: in the possible implementation manner, the channel state information specifically includes information, and in practical application, the practicability of the scheme is improved.

In another possible implementation manner, the channel state information may include an average value of the channel state information of the second resource, or a weighted average value of the channel state information of the second resource, or a channel state information of a third resource, or a weighted average value of the channel state information of the third resource, where the third resource is a part or all of the second resource. In this possible implementation, the content that the channel state information may specifically include is described, and in practical application, the diversity and the practicability of the scheme are improved.

In another possible implementation manner, after the terminal device receives the first information and the second information sent by the network device, and before the terminal device sends a third message to the network device, the method may further include: the terminal equipment receives the random access response authorization sent by the network equipment, and then the terminal equipment can determine a target resource according to the random access response authorization, wherein the target resource is a non-empty subset of the second resource; the sending, by the terminal device, the message three to the network device may include: the terminal device may send a third message to the network device, where the third message includes the channel state information of the target resource. In this possible implementation manner, the terminal device may determine the target resource according to the received random access response grant, then carry the channel state information of the target resource in the message three, and send the message three to the network device. In practical application, the practicability and the completeness of the scheme can be improved.

In another possible implementation manner, after the terminal device receives the first information and the second information sent by the network device, and before the terminal device sends a third message to the network device, the method may further include: the terminal device can receive the random access response authorization sent by the network device, and then the terminal device can determine the target resource according to the random access response authorization; the third step of sending the message to the network device by the terminal device may include: when the target resource is not in the second resource, the terminal device may send a third message to the network device, where the third message carries the target channel state information of the target resource. In the possible implementation manner, the terminal device may determine the target resource according to the received random access response authorization, and when the target resource is not in the second resource, the terminal device carries the channel state information of the target resource in the message three and sends the message three to the network device.

In another possible implementation manner, after the terminal device receives the first information and the second information sent by the network device, and before the terminal device sends a third message to the network device, the method may further include: the terminal device can receive the random access response authorization sent by the network device, and then the terminal device can determine the target resource according to the random access response authorization; the third step of sending the message to the network device by the terminal device may include: in the possible implementation manner, the terminal device may determine the target resource according to the received random access response grant, and when the target resource is not in the second resource, the terminal device sends a third message to the network device, where the third message does not carry the channel state information.

In a random access process, a network device may determine first information and second information, where the first information corresponds to a first resource, the second information is used to determine a second resource, the second resource is a non-empty subset of the first resource, and the second resource includes a resource used by a downlink physical control channel used by the network device to schedule the terminal device to retransmit a message three and the network device to transmit a message four; and then the network equipment sends the first information and the second information to the terminal equipment, and the network equipment receives a third message sent by the terminal equipment, wherein the third message contains channel state information which is related to the second resource.

In this embodiment, the network device may receive a third message sent by the terminal device, where the third message includes channel state information, and the channel state information is related to the second resource; that is, the terminal device only needs to measure the channel state of the second resource, and the second resource is a non-true subset of the first resource, that is, the measurement time of the channel state of each resource allocated to the second resource in the measurement period is longer, so that the measurement of the channel state information of the second resource is more accurate, and the accuracy of downlink quality measurement is improved.

In one possible implementation, the second information includes information related to a preamble, and the information related to the preamble may include at least one of frequency resources for transmitting the preamble, time resources for transmitting the preamble, and a random access sequence of the preamble. In the possible implementation manner, specific content of the second information is provided, and in practical application, the realizability and the practicability of the scheme are improved.

In another possible implementation, the second information may include a set of indication values, and the set of indication values may include at least one indication value. In this possible implementation, another form of the second information is provided, and in practical application, the diversity and practicability of the scheme are improved.

In another possible implementation manner, the sending, by the network device, the second information to the terminal device may include: and the network equipment sends a system message to the terminal equipment, wherein the system message carries the indication value set. In this possible implementation manner, the network device may send the second information to the terminal device through the system message, and in practical application, a specific form of sending the second information is provided, so that the implementability of the scheme is improved.

In another possible implementation manner, the system message also carries the first information. In this possible implementation manner, the network device may send the first information to the terminal device through the system message, and in practical application, a specific form of sending the first information is provided, so that the implementability of the scheme is improved.

In another possible implementation manner, the second information may include a number of narrow bands or a narrow band ratio value, where the number of narrow bands is an integer greater than zero, and the narrow band ratio value is greater than zero and smaller than one. In this possible implementation, another specific included content of the second information is provided, and in practical application, the diversity and the practicability of the scheme are improved.

In another possible implementation manner, the sending, by the network device, the second information to the terminal device may include: the network device may send a broadcast message to the terminal device, where the broadcast message carries the number of the narrow bands or the narrow band ratio value. In this possible implementation manner, the network device may send the second information to the terminal device through a broadcast message, and in practical application, a specific form of sending the second information is provided, so that the implementability of the scheme is improved.

In another possible implementation manner, the broadcast message also carries the first information. In this possible implementation manner, the network device may send the first information to the terminal device through a broadcast message, and in practical application, another specific form of sending the first information is provided, so that the diversity and the practicability of the scheme are improved.

In another possible implementation, the channel state information may include one or a combination of the following: the possible implementation mode shows that the channel state information specifically comprises information, so that the practicability of the scheme is improved in practical application; in addition, the channel state information may further include other parameters related to the channel state, and the specific application is not limited thereto.

In another possible implementation manner, after the network device sends the first information and the second information to the terminal device, before the network device receives the third message sent by the terminal device, the method may further include: the network device may send a random access response grant to the terminal device, where a target resource indicated by the random access response grant is a non-empty subset of the second resource; then, the receiving, by the terminal device, the message three sent by the terminal device may include: and the network equipment receives a third message sent by the terminal equipment, wherein the third message contains the channel state information of the target resource. In this possible implementation manner, the terminal device may determine the target resource according to the received random access response grant, then carry the channel state information of the target resource in the message three, and send the message three to the network device. In practical application, the practicability and the completeness of the scheme can be improved.

In another possible implementation manner, after the network device sends the first information and the second information to the terminal device, and before the network device receives the third message sent by the terminal device, the method may further include: the network device may send a random access response authorization to the terminal device; then, the network device may receive a third message sent by the terminal device, which may include: and when the target resource indicated by the random access response receiving is not in the second resource, the network equipment receives a third message sent by the terminal equipment, wherein the third message contains the target channel state information of the target resource. In this possible implementation manner, when the target resource indicated by the random access response authorization is not in the second resource, the terminal device carries the channel state information of the target resource in the message three and sends the message three to the network device

In another possible implementation manner, after the network device sends the first information and the second information to the terminal device, and before the network device receives the third message sent by the terminal device, the method may further include: the network device may send a random access response authorization to the terminal device; then, the network device may receive a third message sent by the terminal device, which may include: and when the target resource indicated by the random access response receiving is not in the second resource, the network equipment receives a third message sent by the terminal equipment, wherein the third message does not carry channel state information. In this possible implementation manner, another specific scheme is provided when the target resource indicated by the random access response authorization is not in the second resource, and in practical application, the integrity and diversity of the scheme are improved.

A third aspect of the embodiments of the present application provides a random access apparatus, where the random access apparatus has a function of implementing the server behavior in the first aspect, and the function may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

A fourth aspect of the embodiments of the present application provides another random access apparatus, where the random access apparatus has a function of implementing the server behavior in the first aspect, and the function may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

A fifth aspect in an embodiment of the present application provides a random access apparatus, including: a processor, a memory, an input-output device, and a bus; the memory having stored therein computer instructions; when the processor executes the computer instructions in the memory, the memory stores the computer instructions; the processor, when executing the computer instructions in the memory, is adapted to implement any of the implementations of the first aspect.

In one possible implementation, the processor, the memory, and the input/output device are respectively connected to the bus.

A sixth aspect of the embodiments of the present application provides another random access apparatus, including: a processor, a memory, an input-output device, and a bus; the memory having stored therein computer instructions; when the processor executes the computer instructions in the memory, the memory stores the computer instructions; the processor, when executing the computer instructions in the memory, is adapted to implement an implementation as in any of the second aspects.

A seventh aspect of embodiments of the present application provides a chip system, where the chip system includes a processor, configured to support a network device to implement the functions referred to in the first aspect, for example, to transmit or process data and/or information referred to in the method. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the network device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

An eighth aspect of the present embodiment provides a chip system, which includes a processor, and is configured to enable a network device to implement the functions referred to in the second aspect, for example, to transmit or process data and/or information referred to in the method. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the network device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

A ninth aspect of embodiments of the present application provides a computer program product including instructions that, when run on a computer, cause the computer to perform an implementation of any one of the first or second aspects.

A tenth aspect of embodiments of the present application provides a computer-readable storage medium, which is characterized by including instructions that, when executed on a computer, cause the computer to perform any one of the implementations of the first aspect or the second aspect.

In the technical solution provided in the embodiment of the present invention, a terminal device receives first information and second information from a network device, where the first information is used to determine a first resource, the second information is used to determine a second resource, and the second resource is a non-empty-fidelity subset of the first resource; then the terminal equipment determines the second resource according to the first information and the second information, wherein the second resource comprises the resource of a downlink physical control channel used by the network equipment for scheduling the terminal equipment to retransmit the message III and the network equipment to transmit the message IV; the terminal device determines the channel state information according to the second resource, and the terminal device sends a third message to the network device, wherein the third message includes the channel state information. According to the technical scheme of the application, the terminal equipment can determine the second resource according to the second information and the first information, the second resource is a non-vacuum true subset of the first resource, then the channel state information is determined according to the second resource, namely only the channel state of the second resource needs to be measured, and then the terminal equipment carries the channel state information determined according to the second resource in the message III and sends the channel state information to the network equipment; therefore, in the present application, only the channel state of the second resource needs to be measured, and the second resource is a non-true subset of the first resource, that is, the measurement time of the channel state of each resource allocated to the second resource in the measurement period is longer, so that the measurement of the channel state information of the second resource is more accurate, and the accuracy of downlink quality measurement is improved.

Drawings

FIG. 1A is a schematic diagram of the prior art;

FIG. 1B is a system scenario framework diagram according to an embodiment of the present application;

fig. 2 is a schematic diagram of an embodiment of a random access method in an embodiment of the present application;

fig. 3 is a schematic diagram of another embodiment of a random access method in the embodiment of the present application;

fig. 4 is a schematic diagram of another embodiment of a random access method in the embodiment of the present application;

fig. 5 is a schematic structural diagram of a random access apparatus in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a random access apparatus in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a random access apparatus in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a random access apparatus in an embodiment of the present application.

Detailed Description

Embodiments of the present application will now be described with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely illustrative of some, but not all, embodiments of the present application. As can be appreciated by those skilled in the art, with the advent of new technologies, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The embodiment of the application provides a random access method and a random access device, which are used for improving the accuracy of downlink quality measurement

The technical solution of the embodiment of the present application can be applied to various communication systems, for example: such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other systems. The term "system" may be used interchangeably with "network". CDMA systems may implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA may include Wideband CDMA (WCDMA) technology and other CDMA variant technologies. CDMA2000 may cover the Interim Standard (IS) 2000(IS-2000), IS-95 and IS-856 standards. TDMA systems may implement wireless technologies such as global system for mobile Communication (CSM). The OFDMA system may implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash OFDMA, etc. UTRA and E-UTRA are UMTS as well as UMTS evolved versions. Various versions of 3GPP in Long Term Evolution (LTE) and LTE-based evolution are new versions of UMTS using E-UTRA. The fifth Generation (5 Generation, abbreviated as "5G") communication system and the New Radio (NR) are the next Generation communication systems under study. In addition, the communication system can also be applied to future-oriented communication technologies, and all the communication technologies are applied to the technical solutions provided by the embodiments of the present application. The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution in the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and as a person having ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

Fig. 1B illustrates a schematic structural diagram of a possible Radio Access Network (RAN) according to an embodiment of the present disclosure. The RAN may be a base station access system of a 2G network (i.e. the RAN comprises base stations and base station controllers), or may be a base station access system of a 3G network (i.e. the RAN comprises base stations and RNCs), or may be a base station access system of a 4G network (i.e. the RAN comprises enbs and RNCs), or may be a base station access system of a 5G network.

The RAN includes one or more network devices. The network device may be any device with a wireless transceiving function, or a chip disposed in a specific device with a wireless transceiving function. The network devices include, but are not limited to: a base station (e.g. a base station BS, a base station NodeB, an evolved base station eNodeB or eNB, a base station gdnodeb or gNB in a fifth generation 5G communication system, a base station in a future communication system, an access node in a WiFi system, a wireless relay node, a wireless backhaul node), etc. The base station may be: macro base stations, micro base stations, pico base stations, small stations, relay stations, etc. A network, or future evolution network, in which multiple base stations may support one or more of the technologies mentioned above. The core network may support a network of one or more of the above mentioned technologies, or a future evolution network. A base station may include one or more Transmission Receiving Points (TRPs) that are co-sited or non-co-sited. The network device may also be a wireless controller, a Centralized Unit (CU), a Distributed Unit (DU), or the like in a Cloud Radio Access Network (CRAN) scenario. The network device may also be a server, a wearable device, or a vehicle mounted device, etc. The following description will take a network device as an example of a base station. The multiple network devices may be base stations of the same type or base stations of different types. The base station may communicate with the terminal device 1-2, and may also communicate with the terminal device 1-2 through a relay station. The terminal device 1-2 may support communication with multiple base stations of different technologies, for example, the terminal device may support communication with a base station supporting an LTE network, may support communication with a base station supporting a 5G network, and may support dual connectivity with a base station of an LTE network and a base station of a 5G network. Such as a Radio Access Network (RAN) node that accesses the terminal to a wireless network. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In one network configuration, a network device may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node.

The terminal device 1-2, also called User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), a terminal, etc., is a device for providing voice and/or data connectivity to a user, or a chip disposed in the device, such as a handheld device, a vehicle-mounted device, etc., which has wireless connectivity. Currently, some examples of terminal devices are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like. In the following embodiments, the network device takes a base station and a terminal device, and takes a UE as an example for explanation.

Currently, in the random access process between the base station and the UE, as shown in fig. 1A, the UE may determine all the narrow bands of the downlink physical control channel that may be used for the base station to transmit Msg4 before receiving Msg1, and then perform channel state measurement on the narrow bands; then, when the UE receives the Msg2 sent by the base station, the UE may determine a corresponding target narrowband, where the target narrowband is one of all the narrowbands determined by the UE, and then the UE sends Msg3 to the base station, and carries channel state information of the target narrowband in Msg 3. However, since the UE determines that all possible narrow bands of the downlink physical control channel used by the base station to transmit Msg4 are narrow bands, measures the narrow bands, and carries the narrow bands in Msg3, that is, the UE needs to perform channel state measurement on all the determined narrow bands in a measurement period, the measurement time allocated to each narrow band in the measurement period is short, that is, the time for the UE to measure the channel state of the target narrow band is short, which results in low accuracy of downlink channel quality measurement.

In view of this, an embodiment of the present application provides a random access method, which is used to improve accuracy of downlink channel quality measurement. The terminal equipment receives first information and second information from the network equipment, wherein the first information corresponds to a first resource, the second information corresponds to or is used for determining a second resource, and the second resource is a non-vacuum true subset of the first resource; optionally, the terminal device may determine the second resource according to the second information and the first information, and in some possible implementations, the terminal device may also determine the second resource only according to the second information, where the second resource includes a resource of a downlink physical control channel used by the network device to schedule the terminal device to retransmit the message three and the network device to transmit the message four; the terminal device may determine channel state information according to the second resource; the terminal device may then send message three to the network device, where the message three includes the channel state information. That is, in the technical solution of the present application, the terminal device determines the second resource according to the second information and the first information, in some possible implementation manners, the terminal device may determine the second resource only according to the second information, where the second resource is a non-empty-proper subset of the first resource, and then the terminal device determines the channel state information according to the second resource, that is, the terminal device only needs to measure the channel state information of the second resource, and the second resource is a non-empty-proper subset of the first resource, that is, the measurement time of the channel state of each resource allocated to the second resource in the measurement period is longer, so that the measurement of the channel state of the second resource is more accurate, and the accuracy of the downlink channel quality measurement is improved.

In the embodiment of the present application, the second resource includes a resource used by the base station to schedule the UE to retransmit the Msg3 and a resource used by the base station to transmit a downlink physical control channel used by the Msg4, and specifically may be a resource used by a first subframe of a PDCCH configured or scrambled by TC-RNTI and/or C-RNTI in a random access process; optionally, the resource used by the first subframe of the PDCCH may include at least one of a resource used by a first subframe of a machine type communication downlink physical control channel (MTC physical downlink control channel, MPDCCH) and a resource used by a first subframe of a narrowband physical downlink control channel (NB physical downlink control channel, NPDCCH), where the message three is a message transmitted in an uplink transmission resource allocated to the terminal device by the network device after the terminal device receives the random access response, and the message four is collision resolution information sent to the terminal device by the network device. The type of the first resource may include a resource frequency, a narrow band, or a single carrier, and the like, and the type of the second resource may include a frequency, a narrow band, or a single carrier, and the like, which is not limited in this application. In the following embodiments, only the type of the first resource is a narrowband, and the type of the second resource is a narrowband, that is, the first resource is a first narrowband, and the second resource is a second narrowband.

In this embodiment of the application, the terminal device may determine the second narrowband according to the second information and the first information, and in some possible implementations, the terminal device may determine the second narrowband only according to the second information, where the second information may specifically be multiple types of information. The following is specifically illustrated by way of example:

the first method is as follows: the second information is related to the preamble, and the related information of the preamble may be at least one of a frequency resource for transmitting the preamble, a time resource for transmitting the preamble, or a sequence of the preamble, and the terminal device determines the second narrowband according to the first information and the related information of the preamble.

The second method comprises the following steps: the second information is an indicated value set sent by the base station to the UE, and the indicated value set comprises at least one indicated value; the indication value may be a narrowband number, a preset value, or an offset, where the offset is an offset of a narrowband number corresponding to a narrowband used for transmitting the Msg4 and corresponding to a first subframe of a downlink physical control channel for transmitting a random access response or a narrowband used for transmitting the random access response, or an offset of a narrowband number corresponding to a narrowband of a physical downlink control channel for transmitting the Msg4 and corresponding to a narrowband number used for transmitting the preamble, and is not limited herein. And the terminal equipment determines a second narrow band according to the first information and the indication value set, wherein when the indication value set is a narrow band number set, the terminal equipment can determine the second narrow band according to the indication value set.

The third method comprises the following steps: the second information is the number of narrow bands sent to the UE by the base station, where the number of narrow bands is the number of narrow bands included in the second narrow band. And the terminal equipment determines a second narrow band according to the number of the narrow bands and the first information.

The above various modes are explained below with reference to specific examples:

referring to fig. 2, an embodiment of a method for random access according to an embodiment of the present application is described. One embodiment of the random access method in the embodiment of the present application includes:

201. the base station determines the first information and the related information of the preamble.

In the process of random access, the base station may determine first information and related information of a preamble, where the first information includes at least one of a narrowband used by a first subframe of a physical downlink control channel for transmitting a random access response, advance data transmission indication information, and a current operating bandwidth. The advanced data transmission indication information is used to indicate a signal transmission mode used by the current UE, and may be divided into a non-advanced data transmission (non-EDT) scenario and an EDT scenario. In each coverage enhancement level in a non-EDT scene, the total number of bits corresponding to the narrowband used by the base station for transmitting the Msg4 downlink physical control channel is 2, that is, the number k1 of all corresponding narrowband used by all downlink physical control channels possibly used for transmitting Msg4 is 4;

In the EDT scenario and under different coverage enhancement levels, the total number of bits corresponding to the narrow band used by the base station for transmitting the Msg4 physical downlink control channel is different. For example, in EDT scenarios, and coveringIf the enhancement level is a coverage enhancement level B (CEmodeB), and the total number of bits is 3, the number k1 of all corresponding narrow bands that may be used for transmitting the downlink physical control channel used by the Msg4 is 8; in the EDT scenario, and with a coverage enhancement level of CemodeA, the total number of bits is

Wherein the content of the first and second substances,

(log₂(N_NB) Ceil (x) means rounding up x, N_NBFor the number of narrow bands contained in the currently operating downstream bandwidth, and

floor (x) means rounding down x,

for the number of RBs contained in the current downlink bandwidth, the number k1 of all corresponding narrow bands possibly used for transmitting the Msg4 for the downlink physical control channel is N_NB. The related information of the preamble may include at least one of a frequency resource for transmitting the preamble, a time resource for transmitting the preamble, and a preamble sequence, and the preamble sequence may specifically refer to a number index of the preamble sequence.

202. The base station transmits the first information and the related information of the preamble to the UE.

After determining the first information and the preamble related information, the base station may send the first information and the preamble related information to the UE.

203. The UE determines a second narrowband according to the first information and the related information of the preamble.

The first information corresponds to a first narrowband; an alternative way is to: the UE may determine a first narrow band according to the first information, where the first narrow band includes all narrow bands that may be used by the base station to schedule the UE retransmission Msg3 and the downlink physical control channel used by the base station to transmit Msg4, and specifically, all narrow bands that may be used by the first subframe of the PDCCH configured or scrambled by the TC-RNTI and/or the C-RNTI in the random access procedure. The specific process is as follows: the UE may determine, according to the advanced data transmission indication information in the first information and the coverage enhancement level currently used by the UE, a total number of narrow bands that may be used for transmitting the Msg4 for the downlink physical control channel, and then determine, according to the narrow band used by the random access response grant, the number of narrow bands corresponding to the current operating bandwidth, and the total number of narrow bands, a first narrow band that includes all narrow bands that may be used for the random access procedure and used by the first subframe of the PDCCH configured or scrambled by the TC-RNTI and/or the C-RNTI.

By way of example, it is assumed that the current UE operating bandwidth is 3MHz (megahertz) and the current data transmission mode is a non-EDT scenario, and then it can be known from table 1 that the number of the narrow bands corresponding to the current bandwidth is 2.

TABLE 1

Bandwidth of

1.4MHz

3MHz

5MHz

10MHz

15MHz

20MHz

Number of RBs contained in downlink bandwidth

6RB

15RB

25RB

50RB

75RB

100RB

Number of narrow bands contained in downstream bandwidth

1

2

4

8

12

16

In a non-EDT scenario, the total number of bits used by the narrow band used by the downlink physical control channel for transmitting Msg4 is 2, and then the total number of the corresponding narrow bands k1 that may be used by the physical downlink control channel for transmitting Msg4 is 4, and then the used narrow band granted according to the random access response, that is, the narrow band NB used by Msg2, is used_RARAnd the number N of narrow bands corresponding to the current working bandwidth_NB2Respectively calculating to obtain narrow-band numbers respectively as NB_RARmod N_NB2、(NB_RAR+1)mod N_NB2、(NB_RAR+2)mod N_NB2And (NB)_RAR+3)mod N_NB2The calculation formula for each narrowband number is specifically shown in table 2:

TABLE 2

As can be seen from table 2, then the terminal device determines, according to the first information, the first narrowband, that is, the first narrowband includes the narrowband used by the downlink physical control channel for transmitting Msg4 as shown in table 2, where the narrowband used by the downlink physical control channel for transmitting Msg3 or Msg4 as shown in table 2 is represented by the narrowband number of the narrowband, that is, the calculation formula of each narrowband indicated in the table is the calculation formula of each narrowband number.

For example again, it is assumed that the current working bandwidth is 5MHz, the current data transmission uses an EDT scenario, and the used coverage enhancement level is CEmodeB, and then it can be known from table 1 that the number of the narrow bands corresponding to the current working bandwidth is 4; in the EDT scenario, and the current coverage enhancement level is CemodeB, the total number of bits used by the narrow bands of the downlink physical control channel for transmitting the Msg4 is 3, and then the total number of the corresponding narrow bands k1 that may be used by all physical downlink control channels for transmitting the Msg4 is 4; that is, as shown in table 3, the narrowband number values used by the downlink physical control channel for transmitting Msg3 or Msg4 are "000", "001", "010", "011", "100", "101", "110" and "111", and then the narrowband NB used by Msg2 is used_RARAnd the number of narrow bands corresponding to the current working bandwidth is N_NB2The narrowband numbers with narrowband number values of "000", "001", "010", "011", "100", "101", "110", and "111" are calculated, respectively, and the specific calculation formula of each narrowband number is shown in table 3:

TABLE 3

As can be seen from table 3, the terminal device determines the first narrowband according to the first information, that is, the first narrowband includes the narrowband of the downlink physical control channel that transports Msg4 as shown in table 3.

It should be noted that the first information corresponds to the first narrowband, and the first narrowband may be determined by the UE according to the first information as described above, or may correspond to the first narrowband in other ways, which is not limited in this application.

The terminal equipment determines a second narrow band according to the first information and the related information of the preamble, wherein the second narrow band is a non-empty-true subset of the first narrow band, and the second narrow band comprises a narrow band used by a first subframe of a PDCCH (physical downlink control channel) configured or scrambled by TC-RNTI (train control indicator-radio network temporary) and/or C-RNTI (C-RNTI) in a random access process; the following illustrates, one by one, a process of determining the second narrowband specifically for the preamble, where the preamble related information may be a frequency resource for transmitting the preamble, a time resource for transmitting the preamble, or a preamble sequence:

a. the related information of the lead code is frequency resources for transmitting the lead code;

the terminal device may determine the second narrowband according to the frequency resource of the preamble and the first information; an alternative implementation: the terminal device may obtain an offset, where the offset may be an offset of a narrowband number corresponding to a narrowband used for transmitting the Msg4 for the downlink physical control channel relative to a narrowband number corresponding to a narrowband used for transmitting the preamble; the offset may be obtained by the UE through a system message sent by the receiving base station, or may be specified in a communication protocol. Optionally, assuming that the offset is greater than zero and less than a certain value of k1, k1 is a total number of narrow bands used by all possible physical downlink control channels for transmitting the Msg4 in the scenarios corresponding to different data transmission manners and the coverage enhancement level, where k1 is 4 in the non-EDT scenario, k1 is 8 in the EDT scenario and in CemodeB, and k1 is N in the EDT scenario and in CemodeA _NB，N_NBThe number of narrow bands corresponding to the current working bandwidth of the UE; the narrowband used for the downlink physical control channel for transmitting the Msg4 may be Mod (NB)_RAR+k2，N_NB2) Optionally, k2 is a non-negative integer less than or equal to offset, NB_RARAnd N_NB2Is the information carried in the first information.

For example, NB_RAT＝0，N_NB2If the current data transmission method is non-EDT, it can be known that the narrowband used for the downlink physical control channel for transmitting Msg4 is NB, assuming that the current data transmission method is 4 and offset is 2, k2 is {0, 1, 2}, and it is known that the narrowband used for the downlink physical control channel for transmitting Msg4 is NB_RARmod N_NB2、(NB_RAR+1)mod N_NB2And (NB)_RAR+2)mod N_NB2I.e. the second narrowband comprises the number NB_RARmod N_NB2、(NB_RAR+1)mod N_NB2And (NB)_RAR+2)mod N_NB2Of the strip.

In this embodiment, the terminal device determines the second narrowband according to the frequency resource of the preamble and the first information, and the second narrowband may include only one narrowband. In one possible implementation, for example, the terminal device obtains the offset, and the terminal device may determine the NB according to the first information_RARAnd N_NB2，N_NBThe number of narrow bands corresponding to the current working bandwidth of the UE; the terminal device may then determine the narrowband used for transmitting the downlink physical control channel Msg4 as Mod (NB)_RAR+offset，N_NB2)。

It should be noted that the above example is only one possible implementation manner, and any formula, table, other corresponding relation or other predefined rule, etc. that can obtain the same result as the above alternative implementation manner belong to the protection scope of the present application.

In this embodiment, a technical scheme that the terminal device determines the second narrowband through the frequency resource of the preamble is described by way of example, but in practical application, as long as the scheme determines the second narrowband through the frequency resource of the preamble, the scheme belongs to the protection scope of the present application.

b. The related information of the lead code is time resource for transmitting the lead code;

the terminal equipment can determine a second narrow band according to the time resource for transmitting the lead code and the first information; one possible implementation is preamble-time 1 — mod (preamble-time, k1), where k1 — 4 in non-EDT scenarios, k1 — 8 in EDT scenarios and in CemodeB, and k1 — N in EDT scenarios and in CemodeA_NB，N_NBThe number of narrow bands corresponding to the current working bandwidth of the UE; the preamble-time is a time resource for transmitting the preamble, and it can be known that the narrowband used by the downlink physical control channel for Msg4 can be Mod (NB)_RAR+k2，N_NB2) Optionally, k2 is a non-negative integer less than or equal to preamble-time 1.

For example, if preamble-time 61, k1 4, and preamble-time 1 1, k2 is {0, 1}, and NB is chosen as_RAR＝0，N_NB2The narrowband used for the downlink physical control channel for transmitting Msg4 may be Mod (NB) ═ 4 _RAR+k2，N_NB2) Where k2 is a non-negative integer less than or equal to preamble-time 1, then the second narrowband includes NB_RARmod N_NB2And (NB)_RAR+1)mod N_NB2。

In this embodiment, the terminal device determines the second narrowband according to the time resource of the preamble and the first information, and the second narrowband may include only one narrowband. Alternatively, for example, the preamble-time 1 ═ Mod (preamble-time, k1), the terminal device may determine that the narrowband used for transmitting the downlink physical control channel of the Msg4 is Mod (NB)_RAR+Peamble-time1，N_NB2). Assuming preamble-time 61, k1 4, then preamble-time 1 1, then the second narrowband is Mod (NB)_RAR+1 N_NB2)。

It should be noted that the above example is only one possible implementation manner, and any formula, table, other corresponding relation or other predefined rule, etc. that can obtain the same result as the example formula belong to the protection scope of the present application.

In this embodiment, a technical solution that the terminal device determines the second narrowband by using the time resource of the preamble is described by way of example, but in practical application, as long as the scheme determines the second narrowband according to the time resource of the preamble, the scope of protection of the present application is included.

c. The related information of the preamble is a preamble sequence.

The terminal device may determine the second narrowband from the preamble sequence and the first information; in one possible implementation, the Preamble sequence may be the Preamble sequence number Preamble-ID, and Preamble-ID 1 ═ mod (Preamble-ID, k1), where k1 ═ 4 in the non-EDT scenario, k1 ═ 8 in the EDT scenario and in the CemodeB, and k1 ═ N in the EDT scenario and in the CemodeA_NB，N_NBNarrow band corresponding to current working bandwidth of UECounting; then, it can be known that the narrowband used for the downlink physical control channel for transmitting the Msg4 can be Mod (NB)_RAR+k2，N_NB2) Optionally, k2 is an integer less than or equal to preamble-ID 1. Specifically, the Preamble sequence may be a Preamble sequence number, and in the same time-frequency resource location, the base station configures 64 possible Preamble sequences for the user, and the user may select one Preamble sequence for transmission, or in a non-contention random access scenario, the base station allocates a corresponding Preamble to the UE, where the Preamble has a corresponding sequence number, so that the Preamble-ID may be one of 0 to 63.

For example, if Preamble-ID 62, k1 4, then Preamble-ID 1 2, then k2 takes the value {0, 1, 2}, NB_RAR＝0，N_NB2The narrowband used for the downlink physical control channel for Msg4 may be Mod (NB) ═ 4 _RAR+k2，N_NB2) Where k2 is an integer less than or equal to Peamble-ID1, then the second narrowband includes NB_RARmod N_NB2、(NB_RAR+1)mod N_NB2And (NB)_RAR+2)mod N_NB2。

In this embodiment, the terminal device determines the second narrowband according to the preamble sequence and the first information, and the second narrowband may include only one narrowband. Alternatively, for example, the terminal device may determine that the narrowband used for the downlink physical control channel for transmitting the Msg4 is Mod (NB — ID, k1)_RAR+Peamble-ID1，N_NB2). Assuming that Preamble-ID 62, k1 4, and Preamble-ID 1 2, the second narrowband is Mod (NB)_RAR+2，N_NB2)。

In this embodiment, a technical solution that the terminal device determines the second narrowband by using the preamble sequence is described by way of example, but in practical application, any solution that determines the second narrowband according to the preamble sequence is within the protection scope of the present application.

204. The UE determines channel state information from the second narrowband.

The UE may determine the channel state information according to the second narrowband, and as shown in step 203, the second narrowband determined by the UE is a non-empty subset of the first narrowband, so that, compared to the prior art, the measurement time allocated to each narrowband in the second narrowband by the UE is longer, and the measurement corresponding to each narrowband may be more accurate, thereby improving the measurement accuracy of the downlink channel quality.

For example, as shown in the alternative that the preamble related information is the frequency resource for transmitting the preamble in step 203, the second narrowband is NB_RARmod N_NB2、(NB_RAR+1)mod N_NB2And (NB)_RAR+2)mod N_NB2That is, the UE only needs to measure the three narrow bands, and the time allocated to each narrow band can be longer than the time allocated to the first narrow band including the NB in the prior art_RARmod N_NB2、(NB_RAR+1)mod N_NB2、(NB_RAR+2)mod N_NB2And (NB)_RAR+4)mod N_NB2。

205. And the UE sends a third message to the base station, wherein the third message comprises the channel state information.

The UE may send message three to the base station, where message three may include channel state information. It should be noted that the channel state information included in the message three may be an average value of the channel state information of the second narrowband, or a weighted average value of the channel state information of the second narrowband, or a channel state value calculated by other manners according to the channel state information of the second narrowband, or may be channel state information of a part of or all of the second narrowband, which is not limited in this application.

It should be noted that, after step 201 and before step 205, the UE may receive a random access response grant sent by the base station, where the random access response grant carries a target narrowband indicating a downlink physical control channel used for transmitting the Msg4, and the UE may grant the target narrowband according to the random access response And determining a target narrow band used for transmitting a downlink physical control channel of the Msg4, wherein the target narrow band is included in the second narrow band, and then the UE sends Msg3 to the base station, where the Msg3 carries channel state information, and optionally the channel state information may be an average value of the channel state information of the target narrow band, or a weighted average value of the channel state information of the target narrow band, or a channel state value calculated by using the channel state information of the target narrow band in other ways, or channel state information of a part of or all of the narrow bands in the target narrow band. For example, in step 203, it is assumed that the second narrowband determined by the UE includes NB_RARmod N_NB2、(NB_RAR+1)mod N_NB2And (NB)_RAR+2)mod N_NB2And the target narrowband indicated in the random access response authorization is the narrowband Number (NB)_RAR+1)mod N_NB2Then the UE can be carried in Msg3 at this time (NB)_RAR+1)mod N_NB2The channel state information of (a).

In addition, when the target narrowband indicated by the random access response grant received by the UE is not in the second narrowband, then the UE may carry the channel state information of the target narrowband in Msg3 and send the channel state information to the base station, or the UE may not carry any channel state information in Msg3, which is not limited herein.

206. And the base station sends a message four to the UE.

After the base station receives the Msg3 sent by the UE, the base station may send Msg4 to the UE. Specifically, the base station may send Msg4 to the user according to the channel state information carried in Msg3, or may send Msg4 to the base station, without referring to the channel state information, which is not limited in this application.

Optionally, the channel state information may include a channel quality indicator value, a repetition number of transmission reference channel information, RSRQ, and RSRP, and may further include more relevant indexes of a channel state, which is not limited in this application; for example, if the channel state information includes all channel state information of the second narrowband, the channel state information includes a channel quality indicator value of each narrowband in the second narrowband, a number of repetitions of information on a downlink physical control channel for transmitting the Msg4, a reference signal received quality of each narrowband, a reference signal received power of each narrowband, and the like.

In the embodiment of the application, a terminal device receives first information and related information of a lead code from a network device, wherein the first information is used for determining a first resource, the related information of the lead code is used for determining a second resource, and the second resource is a non-empty-true subset of the first resource; then the terminal device determines the second resource according to the first information and the related information of the preamble, where the second resource includes a resource of a downlink physical control channel used by the network device to schedule the terminal device to retransmit Msg3 and the network device to transmit Msg 4; the terminal device determines the channel state information according to the second resource, and sends Msg3 to the network device, wherein the Msg3 includes the channel state information. According to the technical scheme, the terminal equipment can determine second resources according to the related information of the lead codes and the first information, the second resources are a non-empty-true subset of the first resources, then channel state information is determined according to the second resources, namely, only the channel state of the second resources needs to be measured, and then the terminal equipment carries the channel state information determined according to the second resources in the Msg3 and sends the channel state information to the network equipment; therefore, in the present application, only the channel state of the second resource needs to be measured, and the second resource is a non-true subset of the first resource, that is, the measurement time of the channel state of each resource allocated to the second resource in the measurement period is longer, so that the measurement of the channel state information of the second resource is more accurate, and the accuracy of downlink quality measurement is improved.

Referring to fig. 3, an embodiment of a method for random access in a second mode according to the present application is described. One embodiment of the random access method in the embodiment of the present application includes:

301. the base station determines first information and a set of indication values.

In the random access process, the base station may determine first information and a set of indication values, where the content included in the first information specifically refers to the description of step 201 in fig. 2, and is not described herein again. Base ofThe station may determine the set of indication values. Alternatively, the indication value set may include at least one indication value, and the indication value may be a narrowband number, a preset value, or an offset, and is not limited herein. When the indication value is a preset value, optionally, the preset value is a non-negative integer smaller than k 1; when the indication value is an offset, the indication value set includes only one or more offsets; k 1-4 in non-EDT scenarios, k 1-8 in EDT scenarios and in CemodeB, and k 1-N in EDT scenarios and in CemodeA_NB，N_NBThe number of narrow bands corresponding to the current working bandwidth of the UE. The offset is an offset of a narrowband used for transmitting the Msg4 downlink physical control channel relative to a narrowband used for transmitting a preamble, or an offset of a narrowband used for transmitting the Msg4 downlink physical control channel relative to a narrowband used for transmitting the random access response downlink physical control channel. The base station may determine the set of indication values according to preset rules. For example, when the set of indication values is a set of preset values, it is assumed that k1 ═ 4, and the set of indication values may be one of {0}, {1}, {2}, {3}, {0, 1}, {0, 2}, {0, 3}, {1, 2}, {1, 3}, {2, 3}, {0, 1, 2}, {0, 1, 3}, {0, 2, 3}, {1, 2, 3}, and specifically, the narrowband that may be used for transmitting the Msg4 on the downlink physical control channel is determined by the base station side according to a preset rule, and then at least one narrowband of the set of values is selected from the first narrowband, and the UE is informed of channel state measurement on the narrowband corresponding to the set of indication values by sending the indication to the UE.

In addition, when the indication value is offset, then the indication value set includes one or more offsets; taking an offset as an example, assuming that k1 is equal to 4, optionally, the offset may be a non-negative integer smaller than k1, that is, the value of the offset may be 0, 1, 2, or 3.

302. The base station sends the first information and the set of indication values to the UE.

After the base station determines the first information and the set of indication values, the first information and the set of indication values may be transmitted to the UE. It should be noted that the base station may send the first information and the indication value set to the UE through a broadcast message, and may also send the first information and the indication value set through other message types, which is not limited herein.

303. The UE determines a second narrowband according to the first information and the set of indication values.

The UE may determine the first narrowband according to the first information, and for a specific process of determining the first narrowband by the UE according to the first information, reference may be made to the related description in step 203 in fig. 2, which is not described herein again in detail.

The UE can determine a second narrow band according to the first information and the indication value set, wherein the second narrow band is a non-empty-true subset of the first narrow band, and the second narrow band comprises a narrow band used by a first subframe of a downlink physical control channel (PDCCH) which is configured or scrambled by TC-RNTI and/or C-RNTI in a random access process; the indication value set comprises at least one indication value, and the indication value set can be a set of narrow-band numbers, a set of preset values or a set of offset; the following describes the procedure of determining the second narrowband by the UE according to the three types of indication value sets one by one:

a. The indication value set is a narrow-band number set;

and the UE receives the narrowband number set sent by the base station. For example, when k1 is 4, assuming that the narrowband number set is {1, 2} at this time, the UE determines a second narrowband according to the narrowband number set, the second narrowband including a narrowband with narrowband number 1 and a narrowband with narrowband number 2. It should be noted that, when the optional indication value set is the narrowband number set, the UE determines that the second narrowband may be determined according to the narrowband number set, and may not need to be determined in combination with the first information.

b. The set of indication values is a set of preset values;

the UE receives a set of preset values sent by the base station, and optionally, the set of preset values includes at least one preset value, and the preset value is a non-negative integer smaller than k1, so that the UE may determine the second narrowband according to the set of preset values. For example, assuming that the set of preset values is {1, 2}, the narrowband set is known as (NB)_RAR+ Preset value) mod N_NB2The UE may determine that the second narrowband includes a narrowband Number (NB)_RAR+1)mod N_NB2Narrow band and narrow band Number of (NB) is_RAR+2)mod N_NB2Of the strip. For another example, assuming that the preset value set is {0, 1, 2} at this time, the UE may determine that the second narrowband includes a narrowband number NB_RARmod N_NB2Has a narrow band, narrow band Number of (NB) _RAR+1)mod N_NB2And the narrowband Number of (NB) is_RAR+2)mod N_NB2Of (3).

c. The set of indication values comprises one or more offsets;

receiving, by the UE, an offset sent by the base station, optionally, determining, by the UE, a value of k2 according to the offset, where the offset is a non-negative integer smaller than k 1; k2 is a non-negative integer less than or equal to offset; the UE may then determine a second narrowband based on the value of k 2. For example, assuming that k1 is 8 and offset is 4, assuming that the set of k2 values is {0, 1, 2, 3, 4} at this time, the UE may determine that the second narrowband is the narrowband number NB_RARmod N_NB2And narrowband Number (NB)_RAR+1)mod N_NB2Has a narrowband Number (NB)_RAR+2)mod N_NB2Has a narrow band, narrow band Number of (NB)_RAR+3)mod N_NB2Has a narrowband Number (NB)_RAR+4)mod N_NB2Of the strip.

It should be noted that there are many types of indication values that the indication value set may include, and the above examples are only some possible implementations, and in practical applications, as long as the scheme determines the second narrow band according to the indication value set, the scope of the present application is covered.

304. The UE determines channel state information according to the second narrowband.

305. And the UE sends a message III to the base station.

306. And the base station sends a message four to the UE.

Steps 304 to 306 are similar to steps 204 to 206 in fig. 2, and are not described herein again.

In the embodiment of the application, a terminal device receives first information and an indication value set from a network device, wherein the first information is used for determining a first resource, the indication value set is used for determining a second resource, and the second resource is a non-vacuum true subset of the first resource; then the terminal device determines the second resource according to the first information and the indication value set, where the second resource includes a resource of a downlink physical control channel used by the network device to schedule the terminal device to retransmit the Msg3 and the network device to transmit the Msg 4; the terminal device determines the channel state information according to the second resource, and sends Msg3 to the network device, wherein the Msg3 includes the channel state information. According to the technical scheme, the terminal device can determine a second resource according to the indication value set and the first information, the second resource is a non-vacuum true subset of the first resource, then the channel state information is determined according to the second resource, namely the channel state of the second resource is only required to be measured, and then the terminal device carries the channel state information determined according to the second resource in the Msg3 and sends the channel state information to the network device; therefore, in the present application, only the channel state of the second resource needs to be measured, and the second resource is a non-true subset of the first resource, that is, the measurement time of the channel state of each resource allocated to the second resource in the measurement period is longer, so that the measurement of the channel state information of the second resource is more accurate, and the accuracy of downlink quality measurement is improved.

Referring to fig. 4, an embodiment of a method for random access in a third mode according to the present application is described. One embodiment of the random access method in the embodiment of the present application includes:

401. the base station determines the first information and the number of narrow bands.

In the process of random access, the base station may determine the first information and the number of the narrow bands, where the content included in the first information specifically refers to the related description of step 201 in fig. 2, and details are not repeated here.

The base station may determine, according to a preset rule, the number of narrow bands, where the number of narrow bands is greater than zero and less than k1, where k1 is 4 in a non-EDT scenario, and k1 is 8 in an EDT scenario and in a CemodeB scenario; in an EDT scenario and under CemodeA, k1 ═ N_NB，N_NBThe number of narrow bands corresponding to the current working bandwidth of the UE;

402. and the base station sends the first information and the narrowband number to the UE.

After the base station determines the first information and the number of narrow bands, the base station may send the first information and the number of narrow bands to the UE. It should be noted that the base station may send the first information and the number of narrow bands to the UE through a broadcast message, and may also send the first information and the number of narrow bands through other message types, which is not limited herein.

403. And the UE determines a second narrow band according to the first information and the number of the narrow bands.

The UE may determine the first narrowband according to the first information, and for a process in which the specific UE may determine the first narrowband according to the first information, reference may be made to the related description in step 203 in fig. 2, which is not described herein again in detail.

The UE may determine a second narrowband according to the first information and the number of the narrowbands, specifically, the UE determines the second narrowband according to a preset rule, the number of the narrowbands, and the first information, where the second narrowband is a non-empty proper subset of the first narrowband, and the second narrowband includes a narrowband used by a first subframe of a downlink physical control channel configured or scrambled by a TC-RNTI and/or a C-RNTI in a random access process. The UE determines the second narrowband according to the preset rule, the number of the narrowband, and the first information, where the type of the preset rule may be multiple, and the following examples are illustrated one by one, and describe a process in which the UE determines the second narrowband according to the corresponding preset rule, the number of the narrowband, and the first information:

a. the preset rule is NB_RARDetermining a second narrow band by taking the narrow band as an initial narrow band in an equally-spaced mode; the method specifically comprises the following steps: in accordance with the formula kx floor (k1/k), ky k1 mod k, where k1 4 in the non-EDT scenario, k1 8 in the EDT scenario and in the CemodeB, and k 1N in the EDT scenario and in the CemodeA _NB，N_NBThe number of narrow bands corresponding to the current working bandwidth of the UE; k is the number of the second narrowband (that is, the number of the narrowband notified by the base station); floor (x) is rounded downward for x, and then it is known that when k3 is greater than or equal to zero and less than or equal to (ky), k2 ═ k3 × (kx +1), k2 is a preset value, and k3 is a narrow-band number of the second narrow band; when k3 is equal to or greater than (ky +1) and equal to or less than (k-1), then k2 is k3 kx + ky, and k2 isThe preset value, k3, is the narrowband number. The following are given by way of example:

the first example is as follows: in the non-EDT scenario, k1 is 4, and when the number of narrowband is 1, kx is floor (4/1) is 4, ky is 4 mod 1 is 0, then k3 is 0, k2 is k3 (kx +1) is 0, and the set of narrowband numbers is (NB)_RAR+k2)modN_NB2＝NB_RARmod N_NB2(ii) a When the number of narrow bands is 2, at this time, kx ═ floor (4/2) ═ 2, ky ═ 4 mod 2 ═ 0, it is known that the value of k3 is {0, 1}, and when k3 ═ 0, k2 ═ k3 (kx +1) ═ 0; when k3 is 1, k2 k3 kx + ky 1 2+0 2, then the second narrowband includes the narrowband number NB_RARmod N_NB2Has a narrowband Number (NB)_RAR+2)mod N_NB2Of (3). The number of other narrow bands is similar, and the detailed description is omitted. Specifically, as shown in table 4, in the case of different numbers of narrow bands, the number of the narrow band corresponding to the narrow band included in the second narrow band is:

TABLE 4

Number of configured narrow bands	Narrowband numbering of the second narrowband
		1	(NB_RAR+k2)mod N_NB2Wherein k2 is 0
2	(NB_RAR+k2)mod N_NB2Wherein the value of k2 is {0, 1}
		3	(NB_RAR+k2)mod N_NB2Wherein the value of k2 is {0, 1, 2}

Example two: in the EDT scenario with the coverage enhancement level of CEmodeB, when the number of narrow bands is 1, then floor (8/1) ═ 8, ky ═ 8 mod 1 ═ 0, then k3 ═ 0, k2 ═ k3 (kx +1) ═ 0, then the set of narrow band numbers is (NB)_RAR+k2)mod N_NB2＝NB_RARmod N_NB2(ii) a When the number of narrow bands is 2, at this time, kx ═ floor (8/2) ═ 4, ky ═ 8 mod 2 ═ 0, it is known that the value of k3 is {0, 1}, and when k3 ═ 0, k2 ═ k3 (kx +1) ═ 0; when k3 is 1, k2 is k3 kx + ky 4; so k2 takes on the value 0, 4. The process of the other narrow-band numbers corresponding to the second narrow-band is similar, and the details are not described one by one. Specifically, as shown in table 5, in the case of different numbers of narrow bands, the number of the narrow band corresponding to the narrow band included in the second narrow band is:

TABLE 5

Number of configured narrow bands	Narrowband numbering of the second narrowband
		1	(NB_RAR+k2)mod N_NB2，k2＝0
2	(NB_RAR+k2)mod N_NB2And k2 takes on {0, 4 }value
		3	(NB_RAR+k2)mod N_NB2K2 takes on the value {0, 3, 6}
4	(NB_RAR+k2)mod N_NB2K2 extractionThe value is {0, 2, 4, 6}
		5	(NB_RAR+k2)mod N_NB2The value of k2 is {0, 2, 4, 6, 7}
6	(NB_RAR+k2)mod N_NB2The value of k2 is {0, 2, 4, 5, 6, 7}
		7	(NB_RAR+k2)mod N_NB2The value of k2 is {0, 2, 3, 4, 5, 6, 7}

Example three: under the EDT scene with coverage enhancement level of CemodeA, the current working bandwidth is 20MHz, namely the number of narrow bands of a first narrow band corresponding to the current working bandwidth is 16; when the number of narrow bands is 1, when floor (16/1) ═ 16 and ky ═ 16 mod 1 ═ 0, it is known that k3 ═ 0, k2 ═ k3 ═ kx +1 ═ 0, and the set of narrow band numbers is (NB)_RAR+k2)mod N_NB2＝NB_RARmod N_NB2(ii) a When the number of narrow bands is 2, at this time, kx ═ floor (16/2) ═ 8, ky ═ 16 mod 2 ═ 0, it is known that the value of k3 is {0, 1}, and when k3 ═ 0, k2 ═ k3 (kx +1) ═ 0; when k3 is 1, k2 k2 k3 kx + ky 8, so k2 takes on {0, 8 }; the process of the other narrow-band numbers corresponding to the second narrow-band is similar, and the details are not described one by one. Specifically, as shown in table 6, in the case of different numbers of narrow bands, the number of the narrow band corresponding to the narrow band included in the second narrow band is:

TABLE 6

b. The preset rule is a form of symmetry with a central narrow band, and when the number k of narrow bands is even, k2 is equal to 0, k-1,1, k1-2 … k/2-1, k1-k/2}, and if the number k of narrow bands is an odd number, k2 is {0, k1-1, 1, k1-2 … ceil (k/2) -1 }. Where k1 is 4 in non-EDT scenarios, k1 is 8 in EDT scenarios and in CemodeB, and k1 is N in EDT scenarios and in CemodeA _NB，N_NBThe number of narrow bands corresponding to the current working bandwidth of the UE; the function ceil (x) is rounding up on x; then the second narrow band is (NB)_RAR+k2)mod N_NB2. For example, when k1 is 4 and k is 2, k2 takes on {0, 3}, and the second narrowband is the narrowband with the number NB_RARmod N_NB2Narrow band and narrow band coding of (NB)_RAR+3)mod N_NB2A narrow band of (a); when k1 is 4 and k is 3, then k2 takes a value of {0, 3, 1}, then the UE may determine that the second narrowband is the narrowband number NB_RARmod N_NB2Has a narrow band, narrow band Number of (NB)_RAR+1)mod N_NB2Has a narrowband Number (NB)_RAR+3)mod N_NB2Of the strip.

The second narrow band determined by two preset rules, namely a and b, has a certain frequency interval between the narrow band allocated to the downlink physical control channel for transmitting Msg4 and Msg2, so that the possibility that the narrow band for transmitting the Msg4 and the narrow band for transmitting Msg2 enter deep fading simultaneously is low, and the robustness of the narrow band used for transmitting the Msg4 downlink physical control channel is enhanced; secondly, the value taking of the symmetrical structure is a natural value taking mode.

c. The preset rule is that k narrow bands with narrow band numbers in the first narrow band in descending order are taken, and assuming that k narrow bands are configured at the time, the UE can determine a set of narrow bands as (NB) _RAR+k2)mod N_NB2Wherein k2 is zero or more and less than (k 2-1); for example, if k is 2, then k2 takes on {0, 1}, and the determined narrowband set is (NB)_RAR+k2)mod N_NB2That is, the UE may determine that the second narrowband is the narrowband number NB_RARmod N_NB2Has a narrowband Number (NB)_RAR+1)mod N_NB2Of the strip. The second narrow band determined by the preset rule can make the measuring frequency interval of each narrow band of the second narrow band short and relevantThe method has stronger performance, more accurate measurement result, and shorter switching time, namely shorter returning time, for switching to the next narrow band in the second narrow band when the channel state measurement of each narrow band in the second narrow band is completed.

It should be noted that the preset rule may also include various other rules besides the above examples, the above examples are only some possible implementations, and any formula, table, other corresponding relation or other predefined rule that achieves the same result as the preset rule of the above examples falls within the scope of protection of the present application.

In this embodiment, a technical solution that the terminal device determines the second narrowband according to the number of the narrowbands is described by way of example, but in practical application, as long as the solution determines the second narrowband according to the number of the narrowbands, the method belongs to the protection scope of the present application.

404. The UE determines channel state information according to the second narrowband.

405. And the UE sends a message III to the base station.

406. And the base station sends a message four to the UE.

Steps 404 to 406 are similar to steps 204 to 206 in fig. 2, and are not repeated herein.

In addition, it should be noted that the second information may also be a narrowband proportion value, optionally, the narrowband proportion value is a ratio of the number of the second narrowband to the number of the first narrowband, and then after receiving the narrowband proportion value, the UE may determine the number of the second narrowband according to the narrowband proportion value and the first information, or may determine the number of the second narrowband according to the narrowband proportion value and a preset value in a protocol or a preset value configured by the network device, optionally, the preset value in the protocol may refer to that in a non-EDT scenario, the preset value is 4, in an EDT scenario of CemodeB, the preset value is 8, and in an EDT scenario of CemodeA, the preset value is N_NB，N_NBFor the number of narrow bands corresponding to the current working bandwidth of the UE, the terminal device may also determine the number of narrow bands of the second narrow band in other manners, which is not limited herein specifically. Then, the UE determines the second narrowband, measures the channel state information, and carries the channel state information in the message three according to the foregoing steps 403 to 406 in fig. 4, which is not described herein again.

It should be noted that, the above illustrates the technical solution of determining the second narrowband by the terminal device according to the narrowband proportion value, and in practical applications, as long as the solution of determining the second narrowband according to the narrowband proportion value belongs to the protection scope of the present application.

In the embodiment of the application, a terminal device receives first information and the number of narrow bands from a network device, wherein the first information is used for determining a first resource, the number of narrow bands is used for determining a second resource, and the second resource is a non-empty proper subset of the first resource; then the terminal equipment determines the second resource according to the first information and the number of the narrow bands, wherein the second resource comprises the resource of a downlink physical control channel used by the network equipment for scheduling the terminal equipment to retransmit the message three and the network equipment to transmit the message four; the terminal device determines the channel state information according to the second resource, and the terminal device sends a third message to the network device, wherein the third message includes the channel state information. According to the technical scheme of the application, the terminal equipment can determine the second resource according to the number of the narrow bands and the first information, the second resource is a non-vacuum true subset of the first resource, then the channel state information is determined according to the second resource, namely the channel state of the second resource is only required to be measured, and then the terminal equipment carries the channel state information determined according to the second resource in the message III and sends the channel state information to the network equipment; therefore, in the present application, only the channel state of the second resource needs to be measured, and the second resource is a non-true subset of the first resource, that is, the measurement time of the channel state of each resource allocated to the second resource in the measurement period is longer, so that the measurement of the channel state information of the second resource is more accurate, and the accuracy of downlink quality measurement is improved.

With reference to fig. 5, the random access method in the embodiment of the present application is described above, and a random access apparatus provided in the embodiment of the present application is described below, where an embodiment of the random access apparatus in the embodiment of the present application includes:

a transceiver module 501, configured to receive first information and second information from a network device, where the first information corresponds to a first resource, and the second information is used to determine a second resource, and the second resource is a non-true subset of the first resource;

a processing module 502, configured to determine a second resource according to the first information and second information, where the second resource includes a resource used by a downlink physical control channel used by the network device to schedule the terminal device to retransmit the message three and used by the network device to transmit the message four; and for determining channel state information from the second resource;

the transceiver module 501 is further configured to send a third message to the network device, where the third message includes the channel state information.

In this embodiment, the second information includes preamble related information, where the preamble related information includes at least one of a frequency resource for transmitting the preamble, a time resource for transmitting the preamble, and a preamble sequence; the processing module 502 is configured to determine the second resource according to the first information and the second information, and includes: for determining the second resource according to the related information of the preamble and the first information.

In this embodiment, the second information includes a set of indication values, the set of indication values including at least one indication value; the processing module 502 is configured to determine the second resource according to the first information and the second information, and includes: and determining the second resource according to the indicated value set and the first information.

In this embodiment, the transceiver module 501 is specifically configured to:

a system message is received from the network device, the system message carrying the set of indication values.

In this embodiment, the system message further carries the first information.

In this embodiment, the second information includes a number of narrow bands or a narrow band ratio value, where the number of narrow bands is an integer greater than zero, and the narrow band ratio value is greater than zero and smaller than one; the processing module 502 is configured to determine the second resource according to the first information and the second information, and includes: the second resource is determined according to the number of the narrow bands and the first information; or; and determining the second resource according to the narrow-band proportion value and the first information.

In this embodiment, the transceiver module 501 is specifically configured to:

and receiving a broadcast message from the network equipment, wherein the broadcast message carries the narrowband number or carries the narrowband proportion value.

In this embodiment, the broadcast message further carries the first information.

In this embodiment, the channel state information includes one or a combination of the following: the value of the channel quality indicator, the number of repetitions of transmitting the reference channel information, RSRQ, and RSRP, or other parameters that can represent the channel quality information, which is not specifically limited herein.

In this embodiment, the channel state information includes an average value of the channel state information of the second resource, or a weighted average value of the channel state information of the second resource, or channel state information of a third resource, or a weighted average value of the channel state information of the third resource, where the third resource is a part or all of the second resource.

In this embodiment, the transceiver module 501 is further configured to: receiving random access response authorization sent by the network equipment; the processing module 502 is further configured to: determining a target resource according to the random access response authorization, wherein the target resource is a non-empty subset of the second resource;

the third message sent by the transceiver module 501 includes the channel state information of the target resource.

In this embodiment, the transceiver module 501 is further configured to receive a random access response authorization sent by the network device; the processing module 502 is further configured to determine a target resource according to the random access response authorization;

When the target resource is not in the second resource, the message three sent by the transceiver module 501 carries the channel state information of the target resource.

when the target resource is not in the second resource, the message three sent by the transceiver module 501 does not carry channel state information.

In this embodiment of the present application, the transceiver module 501 receives first information and second information from a network device, where the first information is used to determine a first resource, and the second information is used to determine a second resource, where the second resource is a non-true subset of the first resource; then, the processing module 502 determines the second resource according to the first information and the second information, where the second resource includes a resource of a downlink physical control channel used by the network device to schedule the terminal device to retransmit the message three and the network device to transmit the message four; the processing module 502 determines the channel state information according to the second resource, and the transceiver module 501 sends a message three to the network device, where the message three includes the channel state information. According to the technical scheme of the application, the processing module 502 can determine a second resource according to second information and first information, wherein the second resource is a non-empty-true subset of the first resource, then determine channel state information according to the second resource, that is, only the channel state of the second resource needs to be measured, and then the transceiver module 501 carries the channel state information determined according to the second resource in the message three and sends the channel state information to the network device; therefore, in the present application, only the channel state of the second resource needs to be measured, and the second resource is a non-true subset of the first resource, that is, the measurement time of the channel state of each resource allocated to the second resource in the measurement period is longer, so that the measurement of the channel state information of the second resource is more accurate, and the accuracy of downlink quality measurement is improved.

In the above description on the random access method in the embodiment of the present application, referring to fig. 6, a random access apparatus provided in the embodiment of the present application is described below, where an embodiment of the random access apparatus in the embodiment of the present application includes:

a processing module 601, configured to determine first information and second information, where the first information corresponds to a first resource, the second information is used to determine a second resource, and the second resource is a non-true-to-empty subset of the first resource, and the second resource includes a resource used by a downlink physical control channel used by the random access apparatus to schedule the terminal device to retransmit the message three and the network device to transmit the message four;

a transceiver module 602, configured to send the first information and the second information to a terminal device;

the transceiver module 602 is further configured to receive a third message sent by the terminal device, where the third message includes channel state information, and the channel state information is related to the second resource.

In this embodiment, the second information may include preamble related information, and the preamble related information may include at least one of frequency resources for transmitting the preamble, time resources for transmitting the preamble, and a random access sequence of the preamble.

In this embodiment, the second information may include a set of indication values, and the set of indication values may include an indication value.

In this embodiment, the transceiver module 602 is configured to:

and sending a system message to the terminal equipment, wherein the system message carries the indication value set.

In this embodiment, the system message further carries the first information.

In this embodiment, the second information may include a number of narrow bands or a narrow band ratio value, where the number of narrow bands is an integer greater than zero, and the narrow band ratio value is greater than zero and smaller than one.

In this embodiment, the transceiver module 602 is configured to:

and sending a broadcast message to the terminal equipment, wherein the broadcast message carries the number of the narrow bands or carries the narrow band proportion value.

In this embodiment, the channel state information may include one or a combination of the following: the value of the channel quality indicator, the number of repetitions of transmitting the reference channel information, RSRQ, and RSRP, or other parameters that can represent the channel quality information, which is not specifically limited herein.

In this embodiment, the channel state information may include an average value of the channel state information of the second resource, or a weighted average value of the channel state information of the second resource, or channel state information of a third resource, or a weighted average value of the channel state information of the third resource, where the third resource is a part or all of the second resource.

In this embodiment, the transceiver module 602 is further configured to send a random access response grant to the terminal device, where a target resource indicated by the random access response grant is a non-empty subset of the second resource;

the message three received by the transceiver module 602 contains the channel state information of the target resource.

In this embodiment, the transceiver module 602 is further configured to:

sending a random access response authorization to the terminal device;

when the target resource indicated by the random access response grant is not in the second resource, the message three received by the transceiver module 602 contains the target channel state information of the target resource.

In this embodiment, the transceiver module 602 is further configured to:

sending a random access response authorization to the terminal device;

when the target resource indicated by the random access response grant is not in the second resource, the message three received by the transceiver module 602 does not contain channel state information.

In this embodiment, the processing module 601 may determine the first information and the second information, then the transceiver module 602 sends the first information and the second information to the terminal device, and the transceiver module 602 may receive a third message sent by the terminal device, where the third message includes channel state information, and the channel state information is determined by the terminal device according to the second resource; that is, the terminal device only needs to measure the channel state of the second resource, and the second resource is a non-true subset of the first resource, that is, the measurement time of the channel state of each resource allocated to the second resource in the measurement period is longer, so that the measurement of the channel state information of the second resource is more accurate, and the accuracy of downlink quality measurement is improved.

An embodiment of the present invention further provides a UE, which may be a random access device, as shown in fig. 7, for convenience of description, only a part related to the embodiment of the present invention is shown, and details of the specific technology are not disclosed, please refer to the method part in the embodiment of the present invention. The terminal device may be any terminal device including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a vehicle-mounted computer, and the like, taking the terminal device as the mobile phone as an example:

fig. 7 is a block diagram illustrating a partial structure of a mobile phone related to a terminal device provided in an embodiment of the present invention. Referring to fig. 7, the handset includes: radio Frequency (RF) circuitry 1110, memory 1120, input unit 1130, display unit 1140, sensors 1150, audio circuitry 1160, wireless fidelity (WiFi) module 1170, processor 1180, and power supply 1190. Those skilled in the art will appreciate that the handset configuration shown in fig. 7 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

Although not shown, the mobile phone may further include a camera, a bluetooth module, etc., which are not described herein.

The processing module 502 in the foregoing embodiment may specifically be the processor 1180 in this embodiment, and therefore details of specific implementation of the processor 1180 are not described herein again.

Referring to fig. 8, an embodiment of a random access apparatus 800 according to the present application includes:

a processor 801, a memory 802, an input-output device 803, and a bus 804;

in one possible implementation, the processor 801, the memory 802, and the input/output device 803 are each coupled to a bus 804, and the memory stores computer instructions.

The processing module 601 in the foregoing embodiment may be specifically the processor 801 in this embodiment, and therefore details of the specific implementation of the processor 801 are not described again. The transceiver module 602 in the foregoing embodiment may specifically be the input/output device 803 in this embodiment.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In another possible design, when the network device or the terminal device is a chip in a terminal, the chip includes: a processing unit, which may be, for example, a processor, and a communication unit, which may be, for example, an input/output interface, a pin or a circuit, etc. The processing unit may execute computer-executable instructions stored in the storage unit, so as to enable a chip in the terminal to perform the random access method of any one of the first aspect or the second aspect. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit outside the chip in the terminal, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.

The processor mentioned in any of the above may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling execution of a program of the data processing method of the first aspect.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims

1. A random access method, the method comprising:

the method comprises the steps that terminal equipment receives first information and second information from network equipment, wherein the first information corresponds to a first resource, the second information is used for determining a second resource, and the second resource is a non-empty proper subset of the first resource;

the terminal equipment determines the second resource according to the first information and the second information, wherein the second resource comprises resources used by a downlink physical control channel used by network equipment for scheduling the terminal equipment to retransmit a message III and used by the network equipment to transmit a message IV;

the terminal equipment determines channel state information according to the second resource;

and the terminal equipment sends a third message to the network equipment, wherein the third message comprises the channel state information.

2. The method of claim 1, wherein the second information comprises preamble related information, and wherein the preamble related information comprises at least one of frequency resources for transmitting a preamble, time resources for transmitting the preamble, and a preamble sequence;

the determining, by the terminal device, the second resource according to the first information and the second information includes:

And the terminal equipment determines the second resource according to the related information of the lead code and the first information.

3. The method of claim 1, wherein the second information comprises a set of indication values, the set of indication values comprising at least one indication value;

and the terminal equipment determines the second resource according to the indication value set and the first information.

4. The method of claim 1, wherein the second information comprises a narrowband number or a narrowband proportion value, wherein the narrowband number is an integer greater than zero, and wherein the narrowband proportion value is greater than zero and less than one;

the terminal equipment determines the second resource according to the number of the narrow bands and the first information;

or;

and the terminal equipment determines the second resource according to the narrow-band proportion value and the first information.

5. The method according to any of claims 1 to 4, wherein the channel state information comprises one or a combination of: channel quality indicator value, number of repetitions of transmission of reference channel information, reference signal received quality, RSRQ, and reference signal received power, RSRP.

6. The method according to any one of claims 1 to 4, wherein the channel state information comprises an average value of the channel state information of the second resource or channel state information of a third resource, and the third resource is a part or all of the second resource.

7. The method according to any one of claims 1 to 4, wherein after the terminal device receives the first information and the second information sent by the network device, and before the terminal device sends a message three to the network device, the method further comprises:

the terminal equipment receives random access response authorization sent by the network equipment;

the terminal equipment determines a target resource according to the random access response authorization, wherein the target resource is a non-empty subset of the second resource;

the third step of sending the message to the network device by the terminal device comprises:

and the terminal equipment sends a third message to the network equipment, wherein the third message comprises the channel state information of the target resource.

8. A random access method, the method comprising:

the network equipment determines first information and second information, wherein the first information corresponds to a first resource, the second information is used for determining a second resource, the second resource is a non-vacuum true subset of the first resource, and the second resource comprises resources used by a downlink physical control channel used by the network equipment for scheduling a terminal equipment retransmission message three and a network equipment transmission message four;

The network equipment sends the first information and the second information to the terminal equipment;

and the network equipment receives a third message sent by the terminal equipment, wherein the third message contains channel state information, and the channel state information is related to the second resource.

9. The method of claim 8, wherein the second information comprises preamble related information, and wherein the preamble related information comprises at least one of frequency resources for transmitting a preamble, time resources for transmitting the preamble, and a preamble sequence.

10. The method of claim 8, wherein the second information comprises a set of indication values, and wherein the set of indication values comprises at least one indication value.

11. The method of claim 8, wherein the second information comprises a narrowband number or a narrowband proportion value, wherein the narrowband number is an integer greater than zero, and wherein the narrowband proportion value is greater than zero and less than one.

12. The method according to any of claims 8 to 11, wherein the channel state information comprises one or a combination of: channel quality indicator value, number of repetitions of transmission of reference channel information, reference signal received quality, RSRQ, and reference signal received power, RSRP.

13. The method according to any of claims 8 to 11, wherein the channel state information comprises an average value of channel state information of the second resource or channel state information of a third resource, the third resource being a part or all of the second resource.

14. The method according to any one of claims 8 to 11, wherein after the network device sends the first information and the second information to the terminal device, and before the network device receives a third message sent by the terminal device, the method further comprises:

the network equipment sends random access response authorization to the terminal equipment, wherein target resources indicated by the random access response authorization are non-empty subsets of the second resources;

the third step of the network device receiving the message sent by the terminal device includes:

and the network equipment receives a third message sent by the terminal equipment, wherein the third message contains the channel state information of the target resource.

15. A random access apparatus, characterized in that the random access apparatus comprises:

a transceiver module, configured to receive first information and second information from a network device, where the first information corresponds to a first resource, and the second information is used to determine a second resource, where the second resource is a non-empty proper subset of the first resource;

A processing module, configured to determine the second resource according to the first information and the second information, where the second resource includes a resource used by a downlink physical control channel used by a network device to schedule a terminal device to retransmit a message three and used by a network device to transmit a message four; and for determining channel state information from the second resource;

the transceiver module is further configured to send a third message to the network device, where the third message includes the channel state information.

16. The random access apparatus of claim 15, wherein the second information comprises preamble related information, and wherein the preamble related information comprises at least one of a frequency resource for transmitting a preamble, a time resource for transmitting the preamble, and a preamble sequence; the processing module is configured to determine the second resource according to the first information and the second information, and includes: for determining the second resource according to the related information of the preamble and the first information.

17. The random access apparatus of claim 15, wherein the second information comprises a set of indication values, the set of indication values comprising at least one indication value; the processing module is configured to determine the second resource according to the first information and the second information, and includes: and the second resource is determined according to the indicated value set and the first information.

18. The random access apparatus according to claim 15, wherein the second information includes a number of narrow bands or a narrow band ratio value, the number of narrow bands is an integer greater than zero, and the narrow band ratio value is greater than zero and smaller than one; the processing module is configured to determine the second resource according to the first information and the second information, and includes: the second resource is determined according to the number of the narrow bands and the first information; or; and determining the second resource according to the narrow-band proportion value and the first information.

19. The random access device according to any of claims 15 to 18, wherein the channel state information comprises one or a combination of: channel quality indicator value, number of repetitions of transmission of reference channel information, reference signal received quality, RSRQ, and reference signal received power, RSRP.

20. The random access apparatus according to any of claims 15 to 18, wherein the channel state information comprises an average value of the channel state information of the second resource or channel state information of a third resource, the third resource being a part or all of the second resource.

21. The random access apparatus according to any one of claims 15 to 18,

the transceiver module is further configured to: receiving random access response authorization sent by the network equipment;

the processing module is further configured to: determining a target resource according to the random access response authorization, wherein the target resource is a non-empty subset of the second resource;

and the third message sent by the transceiver module contains the channel state information of the target resource.

22. A random access apparatus, characterized in that the random access apparatus comprises:

a processing module, configured to determine first information and second information, where the first information corresponds to a first resource, and the second information is used to determine a second resource, where the second resource is a non-true-to-empty subset of the first resource, and the second resource includes a resource used by a downlink physical control channel used by a network device to schedule a terminal device to retransmit a message three and a network device to transmit a message four;

the transceiver module is used for sending the first information and the second information to terminal equipment;

the transceiver module is further configured to receive a third message sent by the terminal device, where the third message includes channel state information, and the channel state information is related to the second resource.

23. The random access apparatus of claim 22, wherein the second information comprises preamble related information, and wherein the preamble related information comprises at least one of frequency resources for transmitting a preamble, time resources for transmitting the preamble, and a preamble sequence.

24. The random access apparatus of claim 22, wherein the second information comprises a set of indication values, the set of indication values comprising at least one indication value.

25. The random access apparatus of claim 22, wherein the second information comprises a narrowband number or a narrowband proportion value, the narrowband number is an integer greater than zero, and the narrowband proportion value is greater than zero and less than one.

26. The random access apparatus according to any of claims 22 to 25, wherein the channel state information comprises one or a combination of: channel quality indicator value, number of repetitions of transmission of reference channel information, reference signal received quality, RSRQ, and reference signal received power, RSRP.

27. The random access apparatus of any of claims 22-25, wherein the channel state information comprises an average of the channel state information of the second resource or channel state information of a third resource, the third resource being a portion or all of the second resource.

28. The random access apparatus according to any of claims 22 to 25, wherein the transceiver module is further configured to: sending a random access response authorization to the terminal equipment, wherein a target resource indicated by the random access response authorization is a non-empty subset of the second resource;

and the third message received by the transceiver module contains the channel state information of the target resource.

29. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 14.